<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
    * {
      box-sizing: border-box;
    }
 
    .slider {
      width: 560px;
      height: 400px;
      overflow: hidden;
    }
 
    .slider-wrapper {
      width: 100%;
      height: 320px;
    }
 
    .slider-wrapper img {
      width: 100%;
      height: 100%;
      display: block;
    }
 
    .slider-footer {
      height: 80px;
      background-color: rgb(100, 67, 68);
      padding: 12px 12px 0 12px;
      position: relative;
    }
 
    .slider-footer .toggle {
      position: absolute;
      right: 0;
      top: 12px;
      display: flex;
    }
 
    .slider-footer .toggle button {
      margin-right: 12px;
      width: 28px;
      height: 28px;
      appearance: none;
      border: none;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      border-radius: 4px;
      cursor: pointer;
    }
 
    .slider-footer .toggle button:hover {
      background: rgba(255, 255, 255, 0.2);
    }
 
    .slider-footer p {
      margin: 0;
      color: #fff;
      font-size: 18px;
      margin-bottom: 10px;
    }
 
    .slider-indicator {
      margin: 0;
      padding: 0;
      list-style: none;
      display: flex;
      align-items: center;
    }
 
    .slider-indicator li {
      width: 8px;
      height: 8px;
      margin: 4px;
      border-radius: 50%;
      background: #fff;
      opacity: 0.4;
      cursor: pointer;
    }
 
    .slider-indicator li.active {
      width: 12px;
      height: 12px;
      opacity: 1;
    }
  </style>
</head>
<body>
    <div class="slider">
    <div class="slider-wrapper">
      <img src="./images/slider01.jpg" alt="" />
    </div>
    <div class="slider-footer">
      <p>对人类来说会不会太超前了？</p>
      <ul class="slider-indicator">
        <li class="active"></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
        <li></li>
      </ul>
      <div class="toggle">
        <button class="prev"><</button>
        <button class="next">></button>
      </div>
    </div>
  </div>
  <script>
    // 1. 初始数据
    const data = [
      { url: './images/slider01.jpg', title: '对人类来说会不会太超前了？', color: 'rgb(100, 67, 68)' },
      { url: './images/slider02.jpg', title: '开启剑与雪的黑暗传说！', color: 'rgb(43, 35, 26)' },
      { url: './images/slider03.jpg', title: '真正的jo厨出现了！', color: 'rgb(36, 31, 33)' },
      { url: './images/slider04.jpg', title: '李玉刚：让世界通过B站看到东方大国文化', color: 'rgb(139, 98, 66)' },
      { url: './images/slider05.jpg', title: '快来分享你的寒假日常吧~', color: 'rgb(67, 90, 92)' },
      { url: './images/slider06.jpg', title: '哔哩哔哩小年YEAH', color: 'rgb(166, 131, 143)' },
      { url: './images/slider07.jpg', title: '一站式解决你的电脑配置问题！！！', color: 'rgb(53, 29, 25)' },
      { url: './images/slider08.jpg', title: '谁不想和小猫咪贴贴呢！', color: 'rgb(99, 72, 114)' },
    ]
    // //1.获取元素
    // const img = document.querySelector('.slider-wrapper img')
    // const p = document.querySelector('.slider-footer p')
    // let i = 0 //信号量 控制图片的张数
    // //2.开启定时器
    // //console.log(sliderData[i]); 拿到对应的对象了
    // setInterval(function(){
    //     i++
    //     if(i >= sliderData.length){
    //         i = 0
    //     }
    //     //console.log(sliderData[i])
    //     img.src = sliderData[i].url
    //     p.innerHTML = sliderData[i].title
    //     document.querySelector('.slider-indicator .active').classList.remove('active')
    //     document.querySelector(`.slider-indicator li:nth-child(${i + 1})`).classList.add('active')
    // },1000)
    


    //获取元素
    const img = document.querySelector('.slider-wrapper img')
    const p = document.querySelector('.slider-footer p')
    const footer = document.querySelector('.slider-footer')

    //1.右按钮
    //1.1 获取右侧按钮
    const next = document.querySelector('.next')
    let i = 0 //信号量 控制播放图片张数
    //1.2 注册点击事件
    next.addEventListener('click', function(){
        i++
        //1.6 判断条件 如果大于8 就复原为0
        if(i >= data.length){
            i = 0
        }
        //1.3 得到对应的对象s
        //console.log(data[i]);
        toggle()

    })
     //2.左按钮
    //2.1 获取左侧按钮
    const prev = document.querySelector('.prev')
    //1.2 注册点击事件
    prev.addEventListener('click', function(){
        i--
        //1.6 判断条件 如果小于0 则爬到最后一张图片索引号为7
        if(i < 0){
            i = data.length - 1
        }
        //1.3 得到对应的对象s
        //console.log(data[i]);
        toggle()

    })

    //声明一个渲染函数作为复用
    function toggle(){
        //1.4 渲染对应的数据
        img.src = data[i].url
        p.innerHTML = data[i].title
        footer.style.backgroundColor = data[i].color
        //1.5 更换小圆点 先移除原来的类名， 当前li再添加这个类名
        document.querySelector('.slider-indicator .active').classList.remove('active')
        document.querySelector(`.slider-indicator li:nth-child(${i + 1})`).classList.add('active')
    }

    //3. 自动播放模块let timerId = 0
    let timerId = setInterval(function(){
        //利用js自动调用点击事件
        next.click()
    },1000)
    //4. 鼠标经过大盒子 停止定时器
    const slider = document.querySelector('.slider')
    //注册事件
    slider.addEventListener('mouseenter', function(){
        //停止定时器
        clearInterval(timerId)
    })

    //5. 鼠标离开大盒子 开启定时器
    //注册事件
    slider.addEventListener('mouseleave', function(){
        //停止定时器
        clearInterval(timerId)
        //开启定时器
        timerId = setInterval(function(){
        //利用js自动调用点击事件
        next.click()
      },1000)
    })
  </script>
</body>
</html>